Door closer



March 16 1926. 1,577,360

' R. s. POTTER DOOR CLOSER Filed April 2, 1924 Patented Mar. 16, 1926.

UNITED sTArrEs earenr orFICEQ/f ROBERT S. POTTER, OF GREENWICH, CONNECTICUT, ASSIGNORTO THE YALE & TOWNE MANUFACTURING COMPANY, 0F STAMFORD, CONNECTICUT.

DOOR CLOSER.

Application tiled April 2, 1924. Serial No. 703,751.

0 all whom it may concern.' y

Be it known that I, ROBERT S. POTTER, a citizen of the United States, and resident of Greenwich, in the county of Fairfield and State of Connecticut, have invented certain neW and useful Improvements in Door Closers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertams to make and use the same.

This invention relates to improvements 1n door closers and more particularly to such as embody coiled spring structureone object of theo invention being to provide a spring structure in a door closer, which shall, in a minimum amount of space, insure such efficiency as may be had with the use of a long spring.

A further object is to so construct and arrange a spring structure for a door'closer that the life of the same shall be prolonged and so that efficiency of the device shall be ensured.

With these and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompaying drawings,-

Figure 1 is a view in section illustrating an embodiment of my invention, and

Figure 2 is a plan view.

The casing of a door closer is represented at 1 and receives in its lower portion, a nut 2 which carries an upwardly projecting tubular member 3 through which the spindle 4 of the closer passes and in which suitable packing is provided for the spindle.

The spring structure is of compound character, comprising upper and lower coiled springs 5 and 6 made of Hat metal and passing through these springs is a coupling member 7. This coupling member is in the form of a loose sleeve and has the inner ends of the respective coiled springs 5 and 6 attached thereto as indicated at 8 and 9. The tubular portion of a Winder 10 is disposed between the fixed tubular member 3 and the coupling sleeve 7 The Winder 10 is made with laterally extending portion 11 and an upwardly extending portion 12 and may be supported on the nut 2. The portions 11 and l2 cooperating with the tubular portion of the Winder 10 form a chamber in which the lower spring 6 is supported,-the upper spring 5 being supported on a ring 13 and the inner portion of the latter rests upon a shoulder 14 formed on the coupling sleeve 7. The Winder 10 is providedat 15 with a lug to engage a corresponding lug 16 in the bottom portion of the casing.

The outer end of the lower spring 6 is secured at 17 to the portion 12 of the Winder 10 and the outer end of the upper spring 5 is secured at 18 to a Winder 19,-the hub portion 20 of which latter is mounted in the cover member 1at of the casing and receives the upper portion of the spindle 4. Suitable connections are provided between the spindle 4 and the main lever 21 of the device and between said lever and the hub of the Winder 19. A sleeve 22 keyed to the spindle 4 is provided with lugs 23 to cooperate with similar lugs 24 on the Winder 10 to effect connection between said spindle and Winder. These specific connections between the Winders and the lever form no part of my present invention but may be such as disclosed in patent granted to me December 25th 1923 and designated by No. 1,478,615. n

My improvements provide a compound spring structure having the advantages, in a door closer, incident to the use of a long spring Without the objections of bulky casing which a long spring would require and furthermore my improvements Will insure, not only the efficiency in operation of the device, but also the longevity of the spring structure of a door closer.

Having fully described my invention What I claim as new and desire to secure by Letters Patent, is:

1. In a door closer, the combination With independently movable winders, of a spring structure comprising a plurality of coiled springs located in alignment with each other, and a coupling member for said springs and havingthe inner end of each of them attached thereto, the outer end 0f one of said springs being connected with one of said winders and the outer end of another of said springs being connected with another of said winders.

2. In e door closer, the combination with supporting the upper spring, and means two winders, of a, spring structure compriswhereby the outer end of the upper spring l0 ing two coiled springs in alignment with and the outer end of the lower spring are each other, one of said springs being snpconnected to the winders respectively. ported by one of said winders, a. coupling In testimony whereof, I have signed this member for said springs and having connecspecification. tion with the inner ends of both of them7 :L ring supported by said coupling member and ROBERT S. POTTER. 

